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Title: Nonferromagnetic linear variable differential transformer

Abstract

A nonferromagnetic linear variable differential transformer for accurately measuring mechanical displacements in the presence of high magnetic fields is provided. The device utilizes a movable primary coil inside a fixed secondary coil that consists of two series-opposed windings. Operation is such that the secondary output voltage is maintained in phase (depending on polarity) with the primary voltage. The transducer is well-suited to long cable runs and is useful for measuring small displacements in the presence of high or alternating magnetic fields.

Inventors:
 [1];  [2]
  1. Powell, TN
  2. Oak Ridge, TN
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
862860
Patent Number(s):
4030085
Assignee:
United States of America as represented by United States Energy (Washington, DC)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01D - MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
nonferromagnetic; linear; variable; differential; transformer; accurately; measuring; mechanical; displacements; presence; magnetic; fields; provided; device; utilizes; movable; primary; coil; inside; fixed; secondary; consists; series-opposed; windings; operation; output; voltage; maintained; phase; depending; polarity; transducer; well-suited; cable; runs; useful; alternating; output voltage; device utilizes; magnetic field; magnetic fields; alternating magnetic; differential transformer; accurately measuring; variable differential; linear variable; secondary coil; mechanical displacement; nonferromagnetic linear; /340/376/

Citation Formats

Ellis, James F, and Walstrom, Peter L. Nonferromagnetic linear variable differential transformer. United States: N. p., 1977. Web.
Ellis, James F, & Walstrom, Peter L. Nonferromagnetic linear variable differential transformer. United States.
Ellis, James F, and Walstrom, Peter L. Tue . "Nonferromagnetic linear variable differential transformer". United States. https://www.osti.gov/servlets/purl/862860.
@article{osti_862860,
title = {Nonferromagnetic linear variable differential transformer},
author = {Ellis, James F and Walstrom, Peter L},
abstractNote = {A nonferromagnetic linear variable differential transformer for accurately measuring mechanical displacements in the presence of high magnetic fields is provided. The device utilizes a movable primary coil inside a fixed secondary coil that consists of two series-opposed windings. Operation is such that the secondary output voltage is maintained in phase (depending on polarity) with the primary voltage. The transducer is well-suited to long cable runs and is useful for measuring small displacements in the presence of high or alternating magnetic fields.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1977},
month = {6}
}

Patent:

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